Die-stock



J. TEACHOUT. Die- Stock.

No. 27,657. Patented. March 27, 1860.

UNITED STATES PATENT OFFICE.

JAMES TEAGHOUT, OF WATERFORD, NEW YORK.

DIE-STOCK.

Specification of Letters Patent No. 27,657, dated March 27, 1860.

To all whom it may concern:

Be it known that I, JAMES TEACHOUT, of the village of Waterford, in thecounty of Saratoga and State of New York, have invented a new and usefulimprovement in such screw-cutting die-stocks for hand use as have threedies fitted to slide radially in the body of the stock; and I do herebydeclare that the following contains a full and exact description of myinvention, reference being had to the annexed drawings, which make apart of this specification, and in which Figure 1 is an obliqueprojection of one of my improved die-stocks, its top-plate or coverbeing removed, and shown in plan in Fig. 2; and Fig. 3 a section of thesame at the line A B in Figs. 1 and 2.

The same letters of reference indicate like parts in all the figures;and the directions in which the parts move are indicated by the arrowsthereon.

In the screw-cutting die-stocks heretofore made with three dies slidingradially, the dies in some cases have been simultaneously and equallymoved toward the center by means of a scroll-plate arranged upon andengaged with lugs or grooves in or upon the top slde of the dies, anexample being shown in my patent of June 30, 1857 but with thatconstruction the die-stock is too thick for convenient use, and thescroll, to have sufficient strength, must be made so coarse, and sosteep, that it is very difficult to force the dies to their work, and tokeep them from sliding or working outward while in use in cuttingscrew-bolts. And the outer ends of the three radially-sliding dies havebeen made to come in contact with an exterior ring having on its inneredge three spiral cams or curved inclined planes, and on its outer edgea series of teeth into which worked thethread of an endless-ortangentscrew, so that 011 turning the ring by the screw the three dieswere simultaneously and equally advanced toward the center, an examplebeing shown on page 333 of the Practical Metal-Workers Assistant, byOliver Byrne; but in such die-stocks the endless screw, and teeth on thecam-ring become too soon worn out.

In order to produce a die-stock, of the class first above mentioned,which shall be cheap, durable, efficient, and convenient to use, andwhich shall not have the defects of the two kinds last above mentioned,I simultaneously and equally slide the three dies, 0, 0 0 toward thecenter, in the body, D, of the stock, by means of a screw, 6, fitted toturn in the stock and press'against a follower, f, which bears againstthe back end of one die, 0, and also forces inward two other followers,g, 9 against the back ends of the two other dies, 0 c the stock, D,being constructed, and the dies and followers held therein by aremovable cover, It, and formed and arranged so as to be moved by thescrew, all substantially as indicated by the annexed drawings.

What I claim as my invention and desire to secure by Letters Patent is-The combination of the screw, 6, and followers, f, g, 9 with the dies,0, 0 c and stock, D, constructed and arranged substantially as hereinset forth.

JAMES TEAOHOUT.

Vitnesses:

GEO. MAOARDLE, AUSTIN F. PARK.

